24 #define READ_ONCE_TASK_STACK(task, x)			\  argument
28 	if ((task) == current)				\
48 void notrace walk_stackframe(struct task_struct *task, struct pt_regs *regs,  in walk_stackframe()  argument
59 	} else if (task == NULL || task == current) {  in walk_stackframe()
66 		fp = task->thread.s[0];  in walk_stackframe()
67 		sp = task->thread.sp;  in walk_stackframe()
68 		pc = task->thread.ra;  in walk_stackframe()
88 			fp = READ_ONCE_TASK_STACK(task, frame->fp);  in walk_stackframe()
89 			pc = READ_ONCE_TASK_STACK(task, frame->ra);  in walk_stackframe()
107 void notrace walk_stackframe(struct task_struct *task,  in walk_stackframe()  argument
116 	} else if (task == NULL || task == current) {  in walk_stackframe()
121 		sp = task->thread.sp;  in walk_stackframe()
122 		pc = task->thread.ra;  in walk_stackframe()
146 noinline void dump_backtrace(struct pt_regs *regs, struct task_struct *task,  in dump_backtrace()  argument
149 	walk_stackframe(task, regs, print_trace_address, (void *)loglvl);  in dump_backtrace()
152 void show_stack(struct task_struct *task, unsigned long *sp, const char *loglvl)  in show_stack()  argument
155 	dump_backtrace(NULL, task, loglvl);  in show_stack()
168 unsigned long __get_wchan(struct task_struct *task)  in __get_wchan()  argument
172 	if (!try_get_task_stack(task))  in __get_wchan()
174 	walk_stackframe(task, NULL, save_wchan, &pc);  in __get_wchan()
175 	put_task_stack(task);  in __get_wchan()
180 		     struct task_struct *task, struct pt_regs *regs)  in arch_stack_walk()  argument
182 	walk_stackframe(task, regs, consume_entry, cookie);  in arch_stack_walk()